Hinge construction for range oven doors and the like



Feb. 18, 1958 w. D. GRANNAN HINGE CONSTRUCTION FOR RANGE OVEN DOORSAAND Tl'lE LIKE 3 Sheets-Sheet 1 Fild Deo. 30. 1953 Feb. 18, 1958 w, D. GRANNAN' 2,823,661

HINGE CONSTRUCTION Fon RANGE OVEN DooRs AND THE LIKE Filed Deo. 30, 1955 s sheets-sheet 2 "LID a Feb. 18, 1958 w. D. GRANNAN 2,823,651

HINGE CONSTRUCTION FORv RANGEOVENIDOORS AND THE LIKE Filed Deo. so, 195s 3 Sheets-Sheet 3 United States Patent vO HINGE CONSTRUCTION FOR RANGE OVEN DOORS AND THE LIKE William D. Grannan, Des Plaines, Ill., assignor to General Electric Company, a corporationv of New York Application December 30, 1953, Serial No. 401,229

Claims. (Cl. 126-191) This invention relates to hinge constructions embodying readily separable hinge elements and in particular to a hinge construction for heavy cabinet doors such as range oven doors and the like.

Range oven doors are nowalmost universallyv of the bottom hinged type arranged to be swung downwardly from a substantially vertical closed position to a substantialiy horizontal open position; and in electric ranges particularly, the door may be stationed in an ajar position when cooking operations such as broiling are being performed in the oven. The present large size and heavy weight of oven doors has not only dictated the use of heavy hinge constructions but has made it diicult to carry out the operation of assembly of the hinges and mounting the door on the finished body of the range. A further time consuming and uncertain operation in connection with the installation of present types of electric range oven doors results from the requirement that such doors t relatively tightly against the range body across the top of the oven but be spaced slightly from the range body at the bottom of the oven to provide a controlled amount of air flow into the oven at the bottom thereof.

It is, therefore, a main object of my invention to provide an oven door hinge organization in whicha portion of the hinge may be preinstalled in the range body, other portions may be installed in the range oven door as a bench operation, and the oven door assembled on the range by the simple process of inserting the oven door portion of the hinge into operative association with the range body portion thereof and then attaching and appropriately anchoring counterweighting and detent springs.

It is another object of my invention to provide a range oven door and hinge combination in which the oven door has means for positively establishing the desired air gap at the bottom of the door and the hinge has characteristics of self-adjustability which will maintain said air gap regardless of expansion and contraction of the range oven door or the range oven structure itself during the Yuse thereof.

-It is yet another object of the invention to provide a range oven `door hinge which will permit the housewife readily to remove and replace the door without requiring tools or special devices.

-It is a further object of `the invention to provide a range oven door hinge which can be bench-assembled and installed by unskilled workmen.

Itis a further object of the invention to provide a range oven door hinge which is relatively inexpensive to manufacture and install and will perform without failure throughout the life of the range.

In a presently preferred embodiment, these features and objectives are `accomplished by suitably securing Within the range body on each side ofthe oven cavity a support structure having a main support roller rotatable on a tixed shaft, a detent roller disposed thereabove and carried by a shaft which is permitted vertical movement relative thereto, and a fixed-shaft'lowermost rollerstruc ture which has a hub serving as a pivot axis with which ice a hinge link membermay be releasably engaged. Fixed within the door and extending through suitable slots in the inner panel thereof are a pair of hinge structures, each pair -comprising a main `hinge element and the said hinge link. The mainhinge element has aplate-like cam arranged to ride on the support roller and'to be engaged by the movable detent roller. The pivoted hinge link engages over'the hub of the saidlowermost roller and permits the swing axis of the door to shift as the door is moved between its closed and open positions. AI detent spring is providedto urge'the detent rollerresiliently against the cam portion of `the hinge element and thereby maintain said element on the support roller.' Thedetent structure serves alsoas a means for positively preventing the disengagement or misa'lignment ofthe 'shafts of the enumerated rollers while permittingthe'easy vassembly of said shafts and rollers. A suitable removable counterweight spring is preferably provided for each of the hinge elements.

The lower portionof the inner door panel is provided with raised shoulders which cooperate with the .oven liner to position the bottom of the door a predetermined amount away from the oven liner so as to establish a passage through which air may be introduced into the lower por tion of the oven. The floating swing axis arrangement insures the maintenance of the air gap regardlessof the expansion and contraction of the stove and oven parts during operation.

In the accompanying drawings:

Fig. 1 is a front elevation of a cooking range embodying the present invention, with the range oven door open;

Fig. 2 isa side elevation ofthe range with' the oven door closed; Y

Fig. 3 is a fragmentary side sectional elevation, `showing the door in full open position and the hinge elements in their relative positions; l

Figs. 4 and 5 are respectively a rear and a front elevation of the support bracket and shaft locking assembly, with certain hinge elements being shown in section 1in Fig. 5; f

Fig. 6 is an enlargedV plan section taken on linesv 6-6 of Fig. 5;

Fig. 7 is a side elevation; in section as to the range'oven door and range bodyshowing` the relative position of the hinge elements with thev door fully closed;

Fig. 8 is a similar view with the' door in its ajar positiontypical of broiling;

Fig. 9 is a fragmentary-view showingV how a hinge element is introduced into the associated support bracket when the door is being assembled to the range body;

Fig. 10 is an elevational detail showing how ahinge link is supported relative to the door when the door has been, or is in the process of being, removed from the range body; and

Fig. l1 is a fragmentary plan section of a corner of the oven Vdoor and range body toshow the means for establishing an air gap at the base of the oven door.

The accompanying drawings illustratethe separable hinge construction of the present invention as' applied to range oven door structures ofthe bottom hinged type, although it will be understood that it is applicable to any door closure and to side-hinged as well as bottom-hinged' doors.

The range 1 therefore will be assumed to be representative of a cabinet or other enclosure with which it is desired to use a door having a hinge construction which peri-nits the door andV associated hinge elements to befcompletely bench-assembled before .fitting to the doorvframe and permits removalfrom saiddoor frame easily and without the use of tools. The range bodyZ has appropriately supported therein a conventional tive-sided oven structure having a rectangular front opening. The method,

of heating the oven, oven racks and supports, and other usual facilities and equipment, are unimportant to the present invention and have not been shown. On each side of the oven, the range body portion provides rigid support frames 4, 5. These are preferably structural portions of the body itself, but may include independent vertical support members (not shown) disposed internally of the body on each side of the oven immediately behind the front panel of the range body. Various types of range frame structures are common in the art. The oven is, of course, placed well above the base members 6 of the range body, and it is usual to utilize the space beneath the oven as storage space, and a door or a pull-out drawer 7 affords access thereto. In the illustrated bottom hinged door, the four front edges of the oven are usually beaded over with respect to the front of the range body to form a peripheral rim 8. It will be understood that this front rim of the oven occupies a common vertical plane, within normal production tolerances.

The range oven door 9 is a hollow structure, having a-front or outer panel 10 and an inner or liner panel 11. Said panels are of sheet metal and inner panel 11 is of relatively heavy gage metal embossed or otherwise configurated for additional rigidity. The interior of the door is packed with thermal insulation 12, as shown; and, of course, an appropriate handle 13 is provided.

The door is arranged for operation about a floating swing axis, parallel to the bottom portion of rim 8 and in offset relation therewith, and the hinge elements carried by the door therefore cooperate with supporting structure disposed within the range body. It will be understood that the hinge and support structures hereinafter described are used in duplicate. As illustrated, I provide a hinge element anchor within the door; advantageously said anchor may comprise an angle iron 14 welded or otherwies secured to the inner surface of liner 11 and having its web 15 suitably adjacent the side margins of the door for vertical relationship to said rim 8 when the door is assembled to the range body. The hinge element 16 has a mounting portion 17 riveted to the web 15. A portion 18 projects beyond said web as shown and provides a hinge link pivot as presently described. When assembled in the door, a plate-like arcuate cam and detent portion 19 of the hinge element projects from the door normal to the plane thereof and curves forwardly and in the direction of the swing axis. Said hinge element 16 has a detent notch 20 below a cam surface 20.1, an ajar stop 21, a full open stop 22, and a hook portion 23, for purposes hereinafter described. The radially outer edge 24 and inner edge 25 are preferably concentric about an axis disposed within the area of the pivot portion 18 of the hinge element 16. A platelike hinge link 26 (best shown in Fig. l0) is pivotally attached to the portion 18 as shown. The adjacent flat walls of the hinge element 16 and hinge link 26 may for convenience be considered as occupying a common plane, although this is, of course, an approximation. The hinge element 16 and link 26 extend outwardly through the respective upper and lower elongated openings 27, 28, in the oven door liner 11; the opening 28 permits link 26 to rotate about its pivot 29 for a substantial amount in a direction counterclockwise of Fig. lO, but a shoulder 30 of said link will under certain circumstances engage with the door liner 11 at the bottom of opening 28 to interrupt rotation of the link in a clockwise direction. The link is formed to provide the relatively deep notch 26.1 and is completed by the notch 26.2 and the nose or pilot portion 26.3. It will be noted that at the intersection with the pilot portion, the wall defining notch 26.2 is shorter by an amount indicated X, Fig. 10, than the opposite wall of said notch.

The door is mounted relative to the range body and oven cavity by means of structure disposed in opposite sides of the oven and secured suitably to the range body portions 4 and 5. Each such structure includes, a, sup

port bracket 32 which may advantageously comprise a channel having parallel side walls 33, an upper web portion 34 having a tapped opening 35, and a lower web 36 having an offset tab 37. A support bracket is mounted behind each of the body frame portions 4 and 5. The tab 37 extends through a suitable slot in the range body, as shown in Fig. 8, and a machine screw or equivalent 38 passes through the range body Wall into the tapped opening 35. When so positioned each bracket is vertical to the swing axis of the door and is so positioned that the elongated upper slot 39 in the web 34 of the bracket is in registry with a slot 40 in the range body. Similarly, the open space of the bracket below said web 34 is behind a range body slot 41. The last named slot is suitably offset relative to slot 40 to accommodate the offset relation of the hinge elements 16 and 26.

Each bracket 32 supports for free rotation between its side walls a first, or detent, roller 42 and a second or support, roller 43 which respectively engage the upper edge 24 and the lower edge 25 of hinge element 16. As clearly appears, each roller is grooved-see groove 42.1, Fig. 6-to guide the hinge element 16, and it will be obvious that the grooves in the respective rollers 42 and 43 should be in suitable vertical alignment. Hinge link 26 is arranged to cooperate with roller means 44 having a deep groove to provide a hub or pivot-axis portion 44.1 which slidably occupies the notch 26.2 of the link 26. Fig. 4 illustrates that the groove of the roller 44 is oset relative to the groove of the upper and lower rollers to accommodate the offset relation of the link relative to the hinge element 16. The shaft 45 on which roller 42 is carried rides within an elongated slot 46 in the side walls 33 of the bracket 32, whereas the shaft 47 of roller 43 and shaft 48 of roller 44 pass through bracket wall openings with a relatively snug tit therewith. Shafts 45, 47, and 48 are all retained against transverse displacement with respect to bracket 32 by a locking member Sti which tits about the bracket 32 in slidable engagement with the side walls thereof. Said locking member has through each of its side walls, three keyhole slots 51 having a bottom opening through which the shafts 4S, 47, and 48 may pass freely, and a narrow slot portion which accommodates a reduced diameter neck (see 45.1, Fig. 6, as typical) at each end of each of the shafts. It is obvious from Fig. 3 that when thus assembled within the bracket 32, the respective shafts are locked against escape, but the upper shaft45 of the upper roller is permitted movement lengthwise of the bracket 32. Upon assembly, a cotter pin or the like 52 prevents relative movement of the bracket and locking member to an extent which might result in accidental separation. The bracket 32 and locking member Si) may be preassembled and attached to Vthe range body as a unit.

It will be apparent that the angle members 14, hinge elements 16, and hinge links 26 may be assembled to the inner door liner 11 and the latter telescoped within the previously insulation-packed outer panel 10, whereupon the tw-o panels may be secured one to the other by any conventional means (not shown). This is a benchassembly job and can be accomplished by unskilled labor. The workman then takes the door and passes the free end of the hinge elements 16 through the registering slots 39, 40 and engages the portion 22 below the roller 42 and within the groove 42.1 of said roller. Roller 42 is at this time at the bottom of slot 46 and the door must be manipulated to bring the end of the hinge element 16 into the position illustrated in Fig. 9. Hinge link 26 will have rotated forw-ardly toward the range and is maintained in a desired angular relation to the door panel by the shoulder 30. The door is then lifted relative to the bracket 32 (with the hinge element 16 maintaining engagement with the roller 42) and then rotated in a counterclockwise direction about the roller to cause the hinge link 26 to pass through the range body slot 41 with the pilot portion 26.3- of said link passing within the groove 44.1 of the roller-44. Link 26 will be rotated counterclockwise vof Fig. 7, for example, as the pilot portion 26.3 of .the link rides on the hub of roller 44. As the hub enters. the notch 26.2 of the link, which will be signified by the X portion of the notch wall engaging the hub, the link will drop into operative position. The door vis then rotated by the workman into full closed position. A counterweight spring 53 may then be removably hooked over the hook portion 23 of each of the hinge elements 16 and anchored at `suitable previously arranged places in the range body base portion 6. A detent spring 54 may be removably hooked into a depending tab S of each of the members 56 and anchored at suitable previously arranged places in the range base portion 6. This work can be accomplished by reaching into the storage space below the oven. There is no body side wall insulation in the storage space area and the attachment of the respective springs is an easy matter.

The keyhole slots 51 in the member 50 are so arranged, and the slot'46 so sized, (see Figp3) that under the pull of spring 54, the member 50 moves down until when the upper end of the top slot 51 engages shaft 45, the remaining shafts are about midway within their yrespective slots 51. Thus, member 50 serves always to ldraw roller 42 resiliently against the top edge 24 of the cam Aportion 19 of hinge element 16. The weight of the'door is borne primarily by the support roller 43, against which the spring biased detent roller 42 urges the edge 25 of said cam portion lof the hinge element 16. It will be noted from a comparison of Figs. 3, 7, and 8, that the door moves about a floating axis because of the freedornof movement of hinge link 26.

With the door fully closed, detent 20 rests upon the roller '43 and the reaction of the roller 42 against the cam'portion 29.1 serves to hold the door closed. In the ajar positi-on of Fig. 8, the detent roller 42 has seated within the detent arc 21 and again the spring 54 places the roller under sufcient bias to hold the door in position. The roller 43 is supporting the 'd0or,-with hingeglink 26 resisting counterclockwise rotation of the door. Hinge link 26 has undergone a short clockwise rotation `to space the lower edge of the door considerably away from the oven rim 8. In Fig. 3, the stop portion 22 has engaged the roller 42 and the rollers 42 and 43 are cooperatively supporting the door. Hinge link 26 has rotatedy clockwise to the full extent permitted by the shoulder 30 and is not quite seated on the hub of the support roller 48. The Ioven door has risen relative to the .bottom of the oven without conflict with respect to the front rim 8 ofthe oven because of the shift in position of the hinge link 26.

The door is easily removed. Working while the door is fully closed, the springs 53 and 54 are unhooked` from the hinge element 16 and locking member 50 respectively. The door is then lowered to full open position. It will be noted from Fig. 3 that in that position, there is a substantial amount yof slot 46 above the shaft of detent roller 42. The operator may' therefore lift the entire door, and it is seen that the hub of the lowermost roller 44 will disengage from the notch 26.2 of the link 26 before the shaft 45 reaches the top of slot`46. Shoulder 30 holds link 26 in a raised position for easy disengagement from the hub of roller 44. Raising the door has also permitted the hook portion 23 -of hinge element 16 to clear the roller 43 and there is then no further obstruction to complete separation of the door from the range body.

In ranges of the electric type particularly, the admission of air into the oven during baking figures importantly inthe operative results. It is the practice therefore to have an air gap between the oven door inner liner 11 and the bottom of the oven and a tight tit between the inner liner and the top of the oven. In present domestic electric range ovens, the air gap is permitted to range between ;0l0 inch and-.050 inch in view of the practical d ifliculty r1 6 of establishing the airV gaplin ranges ,using conventional oven hinges. In the present case, however, Itake advantage of the iioating swing axis of the door andthe self-adjustability of the hinge link 26 to provide means for accurately and uniformly establishing a proper air gap.

As shown in somewhat schematic section in Fig. 11 and in elevation in Fig. 8, I emboss a relatively narrow rib 56 in the inner oven liner 11 located suitably inwardly of each of the side walls of the` oven door so as to engage the bottom rim 8 of the oven ystructure as the doors close. The two ribs 56 are symmetrically placed with respect to the oven cavity. These ribs are of vuniform projectionfor example, 0.25 inch--and accordingly provide an air gap 57 of this width across the bottom of the oven. It will be obvious that there will also be an air gap along the sides of the range which of course gradually disappears as it approaches the top of the oven. This is s'omewhat exaggeratedly shown in Fig. 2. These side air gaps are of minor importance in view of the relatively deep emboss 58 of the inner liner 11. This emboss, as shown in Figs. l, 2, and l1 extends substantially the full width and depth of the oven cavity and projects for a considerable extent into the oven. However, there is only a small clearance Ibetween the side of this emboss with the Vside and top edges of the oven cavity. Atv the bottom, however, the sloping wall of the emboss 58 is considerably above the bottom of the oven and assists rather than obstructs the inflow of air. The ribs 56 serve always to maintain a uniform air gap regardless of movement of the oven or door walls as theyA expand and contract in use.

While there has been described what is at present considered to be the preferred embodiment of the invention, it will be understood that various modifications may be made therein, and it is intended to cover in the appended claims all such modiications as fall within the true spirit and scope of the invention.

I claim:

l. In a door structure, means comprising side, top, and bottom frame members defining a door opening, a door for said opening, and means for removably hinging said door to said frame to rotate about a swing axis adjacent one edge of said door, said hinging means comprising a rigid hinge member xed to said door and having a plate-like arcuate cam element extending from said door remote from the said one edge thereof, the plane of said cam' element being normal to the said edge of the door, said cam element generally spiralling toward the said swing axis of the door, a support bracket xed to one of said frame members and having spaced rigid side walls accommodating the passage of the cam element therebetween and the removal thereof from said bracket, a support roller carried by said support bracket in engagement with said cam element along one surface thereof to provide a supporting means for said door,.a

vdetent roller carried by said support bracket in 'engagement with another surface of said cam element, a platelike link member pivotally secured relative to said door adjacent its said edge and extending from said door in substantially the plane of said cam element, said link member having a notch portion facing in a direction away from said cam element, pivot means xed to said support bracket and extending between `said spaced walls for passage through the notch portion -of the link member, the diameter of said pivot means being not substantially smaller than the width of said notch portion whereby said link member may rotate about said pivot means Without undue looseness thereon while maintainingan easy slidable relation of said link member and said pivot means for the removal of said link member therefrom, means for resiliently biasing said detent roller into en gagement with the said edge of said cam element, and means for resiliently urging said cam 'element in a doorclosing direction.

2. In a d-oor structure, means comprisingsideftop,

7 and" bottom frame" members defining a door opening, 'a door forsaid'opening and means for removably hinging said door to 'said frame to rotate about a swing axis adjacent one edge of said door, said hinging means cornprising a hinge member fixed to said door and having a plate-like arcuate cam element extending from said door remote from the said one edge thereof, the plane of said cam element being normal to the said edge of the `door and said cam element generally spiralling toward the said swing axis, a support bracket lixed to a frame member and having spaced side walls and a web provided with an opening to accommodate the free movement of said cam element between said Walls and the removal of said cam element from said bracket, a support roller rotatable on a shaft carried by said support bracket for engagement with one edge of said cam element to provide a supporting means for said door, a detent roller rotatable on a shaft carried by said support bracket for engagement with an opposite edge of said cam element, a link member pivotally attached to said hinge member intermediate said edge of the door and said cam element and projecting from said door, the plane of rotation of said link member being normal to the said swing axis, said link member having a notch portion facing in a direction away from said cam element, a roller lixed within said support bracket and extending through said notch portion in rotatable and slidable relation to the walls thereof, a locking member disposed about said bracket in slidable relation therewith and slidably engaging with said roller shafts to maintain said shafts against movement transversely of said support bracket, means including said locking member for resiliently biasing said detent roller into engagement with said cam element edge, and means foriresiliently urging said cam element in a door-closing direction.

3. Hinge means according to claim 2, in which said detent roller is mounted within said support bracket for movement in the plane of said cam element.

4. Hinge means according to claim 2, in which said support roller shaft is mounted in fixed position within Said support bracket and said detent roller shaft is mounted Within said support bracket for longitudinal movement relative to said support bracket and support roller.

5. Hinge means according to claim 2, in which said locking member comprises wal'i members slidably engaging the exterior wail surfaces of said support bracket and having slots receiving reduced diameter portions of the shafts of said rollers to retain said shafts against transverse movement with respect to said bracket.

6. Hinge means according to claim 2, in which said detent roller and support roller are mutually separable to the extent necessary to permit the cam element to be inserted therebetween.

7. Hinging means according to claim 2, in which said cam element has a cam portion traversed by said detent roller when the door approaches closed position, said cam portion and said resiliently biased detent roller cooperating to urge the door toward closed position.

8. A cooking range having a cabinet defining a frontopening oven, a rectangular door for said oven, and hinge means for hinging said door to rotate about a floating swing axis adjacent the bottom edge of said door, said hinge means comprising a rigid hinge member xed to said -door at each side edge thereof, each said hinge member comprising a fiat, arcuate cam plate exten-ding from said door and generally spiralling toward the said swing axis and the plane of said cam plate being normal to the said bottom edge of said door, support means including a rigid channel structure ixed to the front of said range cabinet adjacent each side Wall of the oven, each of said channel structures being in vertical relationship to the said swing axis and having spaced side walls to accommodate the passage -of a earn plate therethrough, a support roller disposed between the side walls of each ofsaid support means for engagement with a surface of theassociated cam plate for supporting said door,a detent roller Vdisposed within each said support means for engagement with another surface of the associated'cam plate, said detent roller being mounted on a shaft extending through an elongated slot in the side Walls of the support member for movement of said roller and shaft longitudinally of said support means, a pivot roller fixed within each said support means, a link member pivotally attached to each said rigid hinge member intermediate said door bottom edge and said cam plate, each said link member extending from said door in substantially the plane of its associated cam plate and each link member having a notch portion for releasably receiving said pivot roller whereby said link members may rotate relative to said door and about said pivot roller, means for biasing at least one of said detent rollers resiliently into engagement with said cam plate surface, and spring means secured within said cabinet and releasably engaging at least one of said cam plates to draw said cam plate in a direction l'urging said door into closed position.

9. A range, comprising a cabinet, a front-opening oven within said cabinet, a door for closing said opening, and hinge means for hinging said door for rotation about a floating swing axis adjacent to and in substantial parallelism with the bottom edge of said oven, said hinge means comprising a rigid hinge member fixed to said door adjacent each side wall thereof and having a ilat, platelike arcuate cam element extending from said door and ygenerally spirallying toward the said swing axis, the plane of each said cam element being normal to the said swing axis, support means fixed within said cabinet at each side of the oven to releasably receive said cam elements, each said support means having a support roller and a detent roller for engagement with opposed surfaces of said cam element and a pivot roller mounted in said support means close to said bottom edge of said oven, a plate-like hinge vlink pivoted to said hinge member and extending from said door in a plane normal to said bottom edge, said hinge link having a slot having an open end facing said pivot roller and arranged slidably to receive said roller, whereby when said cam elements are engaged by the associated support rollers and said pivot rollers are within the hinge links the iioating swing axis results from the pivotal association of the hinge link with the door and with the pivot roller, means for mounting said detent roller for longitudinal movement relative to said support means and said pivot roller to permit disengagement of said hinge link from said pivot roller, means for biasing said detent roller to resiliently urge said cam element into engagement with said support roller, means for biasing said door for rotation towards closed position, and mutually spaced shoulder means projecting from said door to engage with the said bottom edge of said oven to provide a predetermined air gap between the lower portion of said door and said oven edge when the door is in closed position.`

10. A range, comprising a cabinet, a front-opening oven within said cabinet, a door for said oven, and hinge means for hinging said door for rotation about a floating swing axis adjacent and substantially parallel to a front edge of said oven, said hinge means comprising a rigid hinge member fixed to said door along opposed marginal edges thereof, each of said hinge members having a platelike arcuate cam element extending from said door and generally spiralling toward said swing axis, the plane of said cam elements being normal to said swing axis, support means fixed to said range cabinet at opposite sides of said oven, each said support means having mutually separable roller means for engagement respectively with radially inner and radially outer edge portions of the respective cam elements, considered with respect to the said swing axis, the roller means engaging with the said inner edge portions providing a main support for said door,

means xed to each said support means adjacent the said oven front edge to provide a pivot, a hinge link pivotally secured relative to said door and extending from said door into slidable and rotatable engagement with said pivot providing means, whereby the said slidable and rotational engagement and the pivotal relation of said hinge link with said door provides said oating swing axis, and shoulder means on said door engageable with the said edge of said oven as said door is moved to closed position to establish a predetermined air gap between said door and said oven front edge.

UNITED STATES PATENTS Fitch Mar. 22, McCormick Jan. 29, Kelly Mar. 1l, Cossin Jan. 9, Smallwood June 11, Johnson Aug. 17, 

